Speed-changing mechanism



Dec. 23, 1930. E. G. KEsLlNG 1,785,776

SPEED CHANGING MECHANISH Filed Sept. 27, 1928 2 Sheets-Sheet l JIT-5 1- 54H@ Q Dec. 23, 1930. E. G. KESLING 1,785,776

SPEED CHANGING MECHANISM Filed Sept. 27, 1928 2 Sheets-Sheet 2 YjUNITEIJv STATES 45( proximatelyfon thevv line Patented Dec. 23, 1930 PATENT vorifice nLMEns. KESLING, oF BLooMrIELn, MissoUnr swan-CHANGING MECHANISM Application filed September 27, 1928. Serial No. 308,702.

`Thisinvention relates to speed changing mechanism for use in automobiles and has special reference to the devices directly associated with the'gear case.

' v One object ofthe invention is tovprovide an improved speed 'changing mechanismL comprising laterally movable gear shifting arms of the transmission device, in combination with actuators for shifting .said arms laterally, and a supporting spindle of novel construction for supporting and operating said actuators. i

Another object of the invention is to provide vimproved ,means for preventing simultaneous operation of saidarm by said actuators so that it is necessary to disconnect one of said actuators from the corresponding gear shifting arms before the other actuator can be operated, and vice versa.

Another object of the invention is to provide an improved spindle mounted in the gear case for rocking and longitudinal movements and for-supporting and vgear shifting devices. i I

Another objectof the invention is to pro- Y :vide an improved speed changingvmechanism possessing all of the improved features of con vstruction and capable of obtaining all ofthe advantages herein described or made appar- '30 ent yfrom the following description, reference being made to the drawings in which p f Fig. 1 is an endV elevation of a gear case ,in which my invention is embodied.

operating'parts of the Fig. 2 is a cross sectional view on the line,

2-2 of Fig. 1. j

U F. lFig. 3 is a sectional view on the line 3-3 of 1g.. Y t Y l Fig. 4 is a vertical sectional view approxi- ,mately on the line4-'4 of Fig. 5. 49 Fig. 5 is a sectional view approximately von c the line 5-5jof Fig. 1. l f

\ Fig. 6 is a sectional view on theline 6%-6 of Fig. 7 is' a detail sectional view taken aping the means for latching the gear yshifting arms in their starting positions and for preventing simultaneous'shifting of ysaid gears. Themechanism shown comprises a transmissiongear case 1 having a number of paral- 7-7 of Fig. 2, show- -lel rods 2 supported therein below and parallel with corresponding rods 3 likewise supported in the gear case 1. On each of the rods 2 a hub 4 is mounted for sliding movements and fromreach of said hubs 4 a gear shifting arm 5 projects. These gear shiftin arms 5 are operatively connected with spee changing gears in some suitable manner so that when a-unit 4-5 is shifted laterally on its supporting rod 2 the corresponding speed changing gear will be shifted.

The present invention is not concerned with vthe manner of connection of the arms 5 with the gears so that such construction is not 'shown and described in detail. Each arm 5 is formed with a spring pocket 6 enclosing a spring 7 the energy of which is exerted to actuate a ball 8 to seat in spaced notches or recesses 9 'in the associated rod 2 so as to latch the unit- 4-5 in its neutral and shifted position. Each hub 4 is notched in its upper side to receive the lower edge of the corresponding rod 3, whereby said unit 45 is supported in proper assembly and is held from turning from proper adjustment but is capable of longitudinal sliding movements along the rod 2. Each of the rods 3 has a pin 10 mounted therein for vertical sliding movements and yprovided with rounded ends. The length of each pin 10 is greater than. the diameter of the rod 3 in which it is mounted and in the normaler starting position of the corresponding hub 4 the lower end of the pin 10 seats ina cavity 11 in said hub 4 so that it is necessary for the hub 4 to raise thecorresponding pin 10 before the hub can be moved longitudinally in either direction.

Pins 12 are mounted for vertical sliding movements in guides 13 in connection with the gear case 1 and have, their lower ends seated upon the respectivepins 10. The upper ends of the pins '12 are formed withinclined end walls 14 which are opposite correspondingly shaped 'end'walls 15 of the laterally movable rod 16 mounted for slidin movements in guides 17 in connection wit the case 1. The construction and relationship ofthese parts is such that it is impossibley to shift both hubs 4 at the same time, but to permit said hubs tombe shifted selec tively. When either hub 4 is shifted it raises Y the corresponding pins and 12, causing the `one that has been shiftedis locked.

, A tubular element 18pm-*mounted for rocking and longitudinal movementsein bearings 19 and 20 in connection with the gear case l.

Y A tapered member 21'is 'mounted ina corre- V spondingly tapered hole` in one end of the tubular element 18. A bolt 22 projects Yinto the opposite end 'of the tubular element 18 and screws,y into a threaded hole-in the inner yend of the tapered member 21 and thereby Yholds said partsin clamped connection. The

outer end oi" thetapered member 21 projects into `Va tube 23 constituting a support and member 21. The Vend of the tube 23 is 4attached to the gear case 1 and the operating device 24 constitutes means for imparting rocking and longitudinal movements to thegunit Which isv hereintermed spindle and-comprising the parts 18, 21V and 22. 4 f

to the tubular member 18 adjacent to the bearing 19 andhas depending arm 26 movable from and topo- A hub 25 is attached sitionY between spaced arms 27 on one ofthe .j thefarm 26 being effected by moving the supporting: spindle longitudinally` 'A hub v28 is attached'tothetubular `ber 18 adjacent to the bearing 20 and has a depending arm 29 movable from and to pohub 4 to jraise the corresponding pins 10 and is moved in ai direction andfto `,27 the arm 29'is thereby moved sition between spaced arms V80 on the corre sponding hub 4, such vmovement ofthe arm' supporting the spindle.A an extent to 29 being eii'ecte'd by moving the spindle longitudinally. When engage the arm V26 Wholly between the arms Y from between the arms 30 so that When-.the'spindle is rocked the arm 26may be oscillated vto shiftV the .cor- Y "responding hub 4and thereby its gear shitting arm'. -This operation causes theshittedY 12` to posiionto cause'fth'e Vrod 1-6 tolock the opposite rodsl() and 12` and .th

.positehub 4,y VhentheQspindle is movedin theopposite direction to aneXtent to engage the arm' 29 vvholly'betvveen the arms 30 the y sie arm` 26 is tlierebymoved from between vtheA karms 27 Witl'- the result that dle is turned the hub4`that is connected With ing the and 12'and thereby-the,opposite vhub 4.7 In

Visrlactory manner.

n particulars, lbut what I vclaim guidefcr an operatingdevice 24 which is, lconnected with the outer end-of the tapered 4 supporting parts orf-'said devices, a shaft for ereby the opand holdingsaid'connection Vwhen the spinrespective arms 27 and 80V and it is thereby impossible to rock the spindle in either direction. f

The upper end of the gear case is pro- From 'the yforegoing itvvillbe seen vthat i my invention'obtains all of its intended obj j ectsand'purposes in a very etlicient and sat- 2 Obviously, vthe construction, arrangement and relationship of the 'parts may be varied Within equivalent limits Without .departure from the nature and principle of the invention. I contemplate such variations as may be found desirable and do v not restrict myself in these or-unessentiaL and desire to secureby Letters `Patent is;V j f Y Y 1..V lnspeed' changing mechanism, av gear case, gearshiftingdevices, a tubular element.

imparting rockingaand longitudinal movements, to said tubular element, and-a clamping device connected to said shaftrand having rotative adjustable connection With said tubular element securing said shaft in rigid connection With saidtubular element.

2. In speed changing mechanism, a gear case, gear shifting devices, aV tubular element supporting parts of said devices, a shaft for n ...imparting rocking .andy longitudinal movements tolsaidvtubular element, anda clamping device connected Withsaid shaft and hav- ,ing rotative adjustable connectionvvith said tubular element securing said shafty in rigid connection fvvith said t-ubular elementand beingjreleasable to permit detachment of said shaft from said.V tubular element While said element remains in connection'vvithsaidease.

Y, 3. In speed changing mechanism, atransmission gear case,bear1ngs r. r1n connection With said case,'a tubular elementmountedin said bearings for? rocking andv longitudinal movements,-gaisha'ft for imparting rocking and longitudinal movements to said'tubujmfV j element, a connectiorifor said .shaft at one;

end vof said tubular elenientiand'a:part passing through said tubular element engaging with said tubular element. f Y

4.'. In speed'changinglmechanism, a trans-3:?v

y ments in said bearings, a` connecting member .the-arm29 Will be shifted laterally, raising" the' corresponding `pins-10 and 12 and rcauspin 16 to lock the opposite pins 10` in one end yot vsaid tubular element,abolt` ment and engaging. saidA connecting member.

infengagementi spacedibearings supported Y of 'said case, a ,tubular element an Yoperatingshaft inconnection With saidl connecting member for imparting rocking and longitudinal movements `thereto l and.,-

gear lshifting thereby to said tubularmember, and arms supported by said tubular elements. n

5. In speed changing mechanism, a rod, a hub mounted for sliding movements along said rod, an additional Yrod engaging and from turning, a spindle mounted for rocking movements, means for .rocking said spindle, .and an arm supported by said spindle and engaging said hub.

' V6.v The combination with a transmission gear case, and gear shifting devices supported in saidcase, of a spindle for operating said devices comprising a tubular member mounted tor' rocking and longitudinal movements in said case, a shaft for iinparting rocking and longitudinal movements to said member, a connecting element for said shaft extending into said tubular member,

and a fastener for holding said connecting element in rigid relationship to said tubular member.

`7. In speed changing mechanism, the combination of a gear case, gear shifting elements mounted in said case, bearings in connection with said case, a tubular member mounted for rocking Vand longitudinal movements in said bearings, a shaft for imparting rocking and longitudinalmovements to said tubular member, a connecting device for said shaft extending into said tubular member, and an element extending into the opposite end of said tubular member engaging and holding said connecting device.

8. In speedchanging mechanism, a transmission gear case, a pair of parallel rods supported in said case, a gear shifting arm supported for sliding movements on one of said rods, means whereby the other one of said rods prevents said arm from turning 0n the rod on which it is mounted, a sliding pin in connection with said second rod engaging said arm, a third rod, and an element controlled by said third rod for causing said pin to prei vent movement of said arm under'predeter- Y f mined conditions.

9. In speed changing mechanism, a gear case, two pairs of parallel rods mounted in said case, a gear shifting arm supported by one rod of each pair of rods, means whereby the other rod of each pair of rods will prevent the corresponding gear shifting arm from yturning on the rod on which it is mounted,

and a device in connection with each of said other rods for preventing simultaneous shifting of said gear shifting arms.

10. Speedchanging mechanism comprising i a gear case, two'pairsv of parallel rods sup- V *ported in said case, a gear shifting arm supported by one rod of each pair of rods, an element in connection with the otherrod ot' each pair of rods for preventing simultaneous shifting of said gear shifting arms, and means `for controlling said element to permit shifting of either one of said arms and prevent a gear case, two pairs of parallel rods supported in said case, a gear shitting arm supportedby one rod of each pair of rods, elements in connection with the other rod of each pair of rods preventing simultaneous shifting of said gear shifting arms, a spindle supported for rocking and longitudinal movements in said case, arms supported by said spindle Jfor engagement with said gear shifting arms respectively, and means for operating said spindle to operate said gear shifting arms selectively.

12. A speed changing mechanism, a pair of rods, a plurality of gear shifting yokes mounted for sliding movements along said rods, elements engaging and holding said yokes from turning on said rods, a spindle mounted for longitudinal and rocking movements, an arm for each of said yokes rigidly secured to said spindle and selectively engageable with the respective yokes, and means for moving said spindle longitudinally to selectively engage said arms with their respective yolres and for rocking the spindle and arm to shift the yoke selected.

- 13. A speed changing mechanism, a pair of rods, a pair of shifting devices vmounted for slidingmovements along said rods, other rods supported parallel with said first rods and engaging and holding said shifting device from turning on said first rods, a spindle tuating said spindlel to move an arm into engagement with its respective shifting device and to shift the device selected.

ELMER Gr. KESLING. 

